Adjustable index



Feb. 1925 1,525,079 .1. c. LIGGETT v ADJUSTABLE INDEX Filed Oct. 1922os,Adol

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Patented Feb. 3, 1925.

I UNITED STATES v 1,525,079 PATENT, OFFICE.

JOHN C. LIGGETT, OF NEW YORK, N. Y., A SSIGNORLTO POSTINDEX COMPANY,INC., OF

BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

ADJUSTABLE INDEX.

Application filed October 21, 1922. Serial No. 596,156.

To all whom it may concern:

Be it known that I, JOHN-C. LIGGETT, a citizen of the United States, anda resident of New York, in the county and State of New York, haveinvented an Improvement in Adjustable Indexes, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like characters on the drawings representing like parts.

This invention aims to provide a novel and improved adjustable index ofthe class in which paper index slips are disposed edge to edge in guidesin which they are slidable transversely of the slips.

The invention will be best understood by reference to the followingdescription, when taken in connection with the accompanying drawings ofone specific embodiment thereof, while its scope will be moreparticularly pointed out in the appended claims.

In the drawings:

Fig. 1 is a front elevation of a portion of an adjustable indexexemplifying the invention;

Fig. 2 is a sectional view on an enlarged scale on line 2-2 of Fig. 1;

Fig. 3 is a sectional view on an enlarged scale on line 3-3 of Fig. 1;

Fig. 4 is a perspective view of a single index slip as it appears beforebeing placed in the guides; and

Fig. 5 is a similar perspective view of a double index slip.

Referring to the drawings, and to the em- .bodiment of the inventionwhich is illustrated for purposes of exemplification, thcreis shown aseries of index slips 6, which may be single as shown in Fig. 4, ormultiple as shown, for example,- in Fig. 5.

The index slips are held in a frame, herein comprising .a plate or panel7, having two opposite marginal portions, which are bent to forminwardly directed flanges S,

beneath orin back of which are channels 9 to receive the ends of theindex slips, as shown in Fig. 3.

Heretofore in the use of indexes of this class, it has always been aproblem to prevent the index slips from riding over one another, insteadof always remaining with certainty edge to edge. Various expedients havebeen employed to overcome this dilficulty, but even they are open tomore or less objection, as for example the use of celluloid tubes intowhich the index slips are introduced. All of these difficulties areobviated by the provision of the index slip herein shown, which has atransversely curved cross-sectional formation, as clearly shown in Fig.2; that 'is to say, the strip as viewed in cross-section isconcavo-convex. Initially, the height of the are (as shown in dottedlines in Fig. 2) is somewhat greater than the height of the are afterthe slipflhas been introduced into the channel: that is to say, when theslip is in place, it constitutes a spring which is held under stress.This is advantageous for several reasons, among them being the fact thatit causes a frictional resistance to sliding movement of the slip in theframe, and the further fact that the edges of the slip are caused topress firmly against the front face of the back of the panel, and arethereby prevented from riding over one another.

Herein. these advantageous results are ,be under stress in each of thetwo ways described, thus doubly ensuring against accidental displacementof the slip in its guides.

Usually the name or other data will be applied to the slip while thelatter is fiat,

and generally before the slip is cut from a large sheet, because it ismost convenient to apply the data by means of a typewriter. So, also,before the large sheet. is cut, and even before the data is applied, thesheet is treated toexclude moisture and dirt, as by placing the sheet ina bath of thin collodion, and then drying-the sheet. In practice, thiscoating has been applied so thinly that its presence can scarcely bedetected. After the data has been applied to the slip, and the latterhas been given the described formation, it may be, and herein is, coatedagain on both sides with transparent protective material, such ascollodion, although in most cases the one coating applied before Patent'to secure is:

applying the data is sufficient. When the coating is dried, it servesnot only to protect the surface of the'paper from dirt, but, what ismore important, it also excludes moisture-from the paper, andthus tendsto teristics.

thereto, What Iclaiin and. desirevby Letters 1. An adjustable indexcomprising, in

disposed edge to edge, havin springs which are held under stress betweensaid guides. I

2. An adjustable index -,comprising, in combination, a series; of indexmembers disposed edge to edge, each comprising a strip I of paper'havingan initial "concave-convex combination, a-series ofinde members dis-" v-of paper having an initial concavo-convex' form transversely thereofand a frame in which said strips are held under. stress due to saidform.I r

' 3. An' adjustable index comprising, in

posed edge to edge, each comprising a strip form transversely andlongitudinally there-Q of, and a frame in which said strips are helddisposed edge to-edge, having a transversely under stress due to saidform.

4. An adjustable index; comprising, in combination, a fraine'presentingfront and rear guides, and a series of strips of-paper curved formationand thereby constituting springs which areheld under stress between {perfrom foreign matter. f enhance and preserve'its springlike charac-.

' 5.An adjustable indexcomprising, in

combination, aframe presenting front and Having thus describedoneembodimentof rear.'guides, and a series of strips of paper theinvention, but Without limitingmyself disposed edge to edge, havingtransversely curved formation and thereby eonstituting springs whichare-held under-stress between said guides,=said str'ipsbeing coated onboth sides with materia -which excludes moisture rear guides, and aseries of strips of paper disposed edge to' edge, having a transverselycurved formation and thereby constituting.

springs which are held understress between said guides, said stripsbeing coated With material Which increases their resistan'ce tobending.-

7, An adjustable index comprising, in

combination, a, frame presenting f-r'ont and rear guides, anda' seriesof strips of paper disposed edge to edge, having a transversely curvedformation and thereby constituting springs which are held under stressbetweensaidguides, said stripsbeing-coated with transparent materialwhich. excludes mois- '-ture' from the paper and increases itsresistance to bending.

In testimony whereof ,'I have "signed my name to this specification.

JOHN o. LIGGETT.

